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Replacement window

Older homes sure are charming. Sky-high heating and cooling bills – not so much. Rekindle the romance with new, energy-efficient windows. By replacing single-paned windows with energy-efficient windows, you can save about $360 a year in heating and cooling costs (source: ENERGY STAR).


- Each window must be a minimum size of eight square feet 
- U-Factor  < 0.30
- Sashes installed without new windows do not qualify for rebate
- Windows must be installed in a conditioned space where Alliant Energy supplies the primary heating or cooling energy
- One opening equals one window rebate
- Rebate is limited to 50% of equipment minus any manufacturer or dealer rebates

How do I apply?

Whoever installs the windows should complete the rebate form, attach the NFRC sticker from the windows, and a copy of the itemized, date receipt and send to Alliant Energy within 90 days of installation.

How do I find a qualified dealer?
Visit our online Dealer Locator to find a professional in your area.